Folding machine



' ha mw June 2 1931- c. cHmsTlANsEN 1,808,158

vFOLDING MACHINE June 1 2, 1931;.l c. CHRISTIAN-SEN FOLDING MACHINE Filed Oct. 30. 1929 2 Sheets-Sheet 2 Patented June 2, 1931 unirsi) STATES iaagisa PATENT risica CHRISTIAN CHRISTIANSEN, OF LYNN, MASSACHUSETTS, ASSVIGNGR TG RGTARY MA- GHINECOMPANY, OF LYNN, MASSACHUSETTS, A CORPGRITIGN OF MSSAGIIUSETTS FOLDING MACHINE ApplicationfiledV October 30, 1929.

This invention relates to folding machines for folding and pressing down the edges of various kinds of material, and is especially applicable to the type of machine shown and A describedin my co-pending allowed application, Serial No. 269,201, filed April 11, 1928, now Patent No. 1,743,192 dated January 14, 1930. This type ofniachine is particularly adapted for folding the edges of upper stock of foot wear, as for instance for folding the edge of a binding strip or galloon previously stitched to the edge of the leather or other material of the upper. An object of the present invention is to provide an improved folding machine wherein the feeding and folding are vaccomplished continuously as distinguished from step by step folding, and wherein means are provided in advance of the folding operation for heating a relatively dry cement coating on the binding strip and thereby liquefying it sufficiently to cause itto adhere when the strip is thereafter folded and pressed down upon the body of the upper.

A further obfect of the invention is to pro vide a folding machine having means for feeding and folding the edge of the material or the bindingstrip, and in Awhich'itneans is provided for heating the cement on the foldable portion of the material or strip before it reaches the instrumentalities which fold the stock. I

A further object ofthe invention is .to provide a folding machine having alheating kdevice which will be in continuous, even and direct contact with the cemented or gummed portion of the galloon thereby properly heating the cement.

i Other objects of this invention will appear in the following description and appended claims, reference being had to the accompanying drawings forming a part of this specification wherein like reference characters designate corresponding parts in the several views.

Fig. 1 is a side elevation, partly in section, of a folding machine `embodied in'kmy invention.

Y Fig. 2 is an enlarged fragmentary perspective view illustrating the invention.

i Fig. 3 isy a fragmentary plan view, partly Serial No. 403,497.-

Before explaining in detail the present invention it is to be understood that the invention is notlimited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the inventionis capable of other embodiments and of being practised or carried out in various ways. Also it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation, and it is not intended to limit the invention beyond the terms of the several claims hereto appended as considered in view of the prior art and the requirements thereof. A

For the purposes of illustration, I have shown my present invention as applied to a machine constructed in accordance with my above mentioned application, Aalthough it will b e understood that the invention maybe carried out in variousways. As illustrated in the drawings, the machine comprises iiifgeneral a suitable base 20, to which is hinged an upper supporting frame 22, providing a housing for certain of the operating parts. Extend-- ing forwardly from the frame 22 is an overhanging arm 23 which is provided with an annular or oblique bore through which extends a rotary shaft 24. Secured to the rear end of the shaft 24 is a spiral gear 25 ineshing with a spiral worm 26 carried at the forward end of a driving shaft V27 which is suitably journalled in the opposite side walls of the frame 22. This shaft may be driven by means of a suitable belt wheel (notshown) through theA medium of'suitable clutch mechanism in the manner shown in my above mentioned appli- This rotatable head is ly rotated in ai direction opposite to the direction of rotation of the head 29 as indicated by the arrows. Each of the disks 80 is provided with an arcuate notch 31, and the arrangement of the disks and the construction of the notches thereof are such that during operation the notches will straddle the folded edge of the material without flattening the French cord edge.

Beneath the rotatable head 29 is mounted a work supporting roll 32 carried by a support 83, which in turn is mounted on a flexible shaft 34, this shaft being connected with the roll 32 so as t0 rotate thesame during the feeding and folding operations. The

shaft 34 has an extension 35 carrying a worm 36 operated from the shaft 27 by a worm shaft'37. y

l Extending throughthe front wall of the housing 32 is a shaft 38. This shaft carries an inverted AU-sliape spring arm 39. The outer end of the arm 39 is provided with an inclined guide 40, which may be termed the retainer support, within which is slidingly mounted a retainer bar or spindle 4l actuated by means vof a spring 42. The lewer end of this retainer bar 4l is bifurcated to Vprovide outer and inner forks or arms 43 and 44. A retainer roll or disk`45 is rotatably mounted within the forks on a journal pin 46.

This retainer roll or disk cooperates with a projectingV annular guide rib 47 formed on the lower work supporting: roll 32. The support 33 carries a plow 48 which is secured thereto by means of a screw 49,'this plow having an upstanding wall 50 adapted to initially position the binding` strip when the stock is placed in the machine for the folding operation. Y

The present v'machine is illustrated in con-l nection with the foldingof an `edge of stock which, in the present instance, is shown as a piece of leatherrl having stitched along vits edge at 52 abinding strip or galloon 53,

usually of fabric material.. Y

In turning French cord, as illustrated in the presentcase, the stock is placed inthe machine so that the guide rib 47 Vwill project into the stitch line 52, and as the stock 'is fed through the machine (this guide rib follows the stitch line. and guides the stock,

the retainer disk 45 travelling along the edge of the material 51 so as to hold the stock on the guide rib. j p l As in my prior application the stock is simultaneously fed on andl over the work supporting roll 32 by means of theoverlapping disks 30 carried Vby the rotary head 29. These disks are located directly behind the retainer roll 45 and the plow V50 and operate at an angle tothe line of feed'. The disks 30 are givenan orbital movement means of the rotary head 29, and also have a positive rotary movement opposite tov the direction of rotation of the head. The disks 47, and as the disk continues to move it presses down the foldedV binding strip by means of the cam shaped edge 30a.

The disks are continuously in contact with the binding strip and on account of the fact that they continuously fold and press down the strip on an angular line as indicated by the line 54 in Fig. 3, the binding strip is partly pulled overV in advance of the line of fold as shown Vby the portion of the binding strip indicated at 55 in Figs. 2 and 3. In practice this results iny continuously draggingthe binding strip across the rear face and edge of the Yretainer 45.

In commercial practice the binding strip Vis coated alongthe inner face-thereof with cement or gum. The present invention enables a relatively dry Vor normallyV non-sticky cement vtobe used, and when the stock is fed through the machine means .1s provlded for heating this cement sufficiently to cause it to adhere to, the leather pressed down. l l Y Supported on the retainer sleeve40 is a heat conducting member 56, preferably of when the strip` is aluminum. This member has a portion 56a extending downwardly Valong the inner side of the retainer sleeve or support and Yterminating at its lower lend in a bearingsleeve 565 which embraces the spindle or bar 4l kof the retainer disk. The retainer bar 41'has a lug 57 which works in a guideslot 58 inY the bearing portion 56?). The upper end56c of the heat conducting member 56a is cylindrical andtubular, as shown lin Fig. 4, 'andy stat. The temperature of the heating device may thus be varied in accordance with requirements. The heat'. conducting vmember 56crat its upper endis partially enclosed and covered by means of a shield 64. This shield is convex in shape, not only for the purpose of covering they heating velement but also providing a hand hold to permit the operator to lift V and lower the retainer without `danger of burning her hand. The shield is provided lwith a projecting piece which is attached by inea-ns of a screwi66 to the .support 39 for the retainer. .n

. Theheat from the resistance element will Xiao be transmittedthrough the conductor 56 to the lowerend of the retainer, resulting in heating the retainer disk to the required temperature to liquefy the cement. It Will be seen therefore that the heated retainer acts on the cemented side 53?) of the binding strip so that the cement or gum is directly acted upon by the heat from the retainer. Moreover, in the present instance, the cemented side of the binding strip actually contacts with the retainer, and since the stock is fed continuously through the machine, the binding strip is continuously in contact with the heating element. It will therefore be seen that a constant, uniform and direct heating of the binding strip at its cemented side is possible by virtue of the present invention. It will also be noted that the binding strip is heated, as by means of the retainer 45, before it reaches the folding disks 30, so that the cement is properly liquefied before the strip is folded and pressed down upon the leather.

I claim:

1. In a folding machine for folding a binding strip cemented at one sideand stitched to the edge of a material, the combination of means for folding the strip, and heat conducting means in advance of said folding means in contact with said strip at the cemented side thereof.

2. In a folding'4 machine, the combination of means for folding the edge of a material having cement along one face thereof, a member contacting on the said cemented face, heat conducting means contacting with said member, and means for feeding the material from said heating means to the folding means.

3. In a folding machine for folding a binding strip cemented along one side and stitched to the edge of a material, the combination of Work support, means for folding the strip, a Work retainer in advance of the folding means acting at the cemented side of the strip, a support for said retainer. a heat conductingy member mounted on said retainer support and contacting with said retainer adjacent its lower end.

4. In a folding machine for folding a binding strip cemented alongV one side and stitched to the edge of a material, the combination of work support, means for folding the strip,

a work retainer roll in advance of the folding means engaging the cemented side of the strip, and a heat conducting member contacting with said retainer for heating said roll by conduction.

5. In a folding machine, the combination of means for continuously folding the edge of a piece material, a retainer including a support having a roll engaging the material, a heating element, and a heat conducting member engaging said retainer support for transmitting heat by conduction from the heating element to said retainer to cause the retainer to heat a cemented side of the material.

6. In a folding machine for folding a cemented binding stripstitched to a material,

DISCLAIMER 1,808,158.Ohristian Christiansen, Lynn, Mass. FOLDING MACHINE. Patent dated June 2, 1931. Disclaimer filed October 31, 1935, by the assignee, Rotary Machine Company.

Hereby enters this disclaimer to said claims 1 and 2 of said Letters Patent, Which are in the following Words, to Wit:

1. In a folding machine for folding a binding strip cemented at one side and stitched to the edge of a material, the combination of means for folding the strip, and heat conducting means in advance of said folding means in contact with said strip at the cemented side thereof.

2. In a folding machine, the combination of means for folding the edge of a material having cement along one face thereof, a member contacting on the said cemented face, heat conducting means contacting with said member, and means for feeding the material from said heating means to the folding means.

[Ojjcz'al Gazette November 19, 1.935.] 

